2012 Acura MDX Owner's Manual - Page 139

Hazard Warning Button, Rear Window Defogger Hazard Warning Button Rear Window Defogger Make sure the rear window is clear and you have good visibility before starting to drive. The defogger wires on the inside of the rear window can be accidentally damaged. When cleaning the glass, always wipe side-to-side. Pushing this button also turns the mirror heaters on or off. For more information, see page 167. Push the button between the center vents to turn on the hazard warning lights (four-way flashers). This causes all four outside turn signals and both indicators in the instrument panel to flash. Use the hazard warning lights if you need to park in a dangerous area near heavy traffic, or if your vehicle is disabled. The rear window defogger will clear fog, frost, and thin ice from the window. Push the defogger button to turn it on and off. The indicator in the button lights to show the defogger is on. If you do not turn it off, the defogger will shut itself off after about 15 minutes. It also shuts off when you turn off the ignition. You have to turn it on again when you restart the vehicle. 132